Description: Asteropeia mcphersonii is a shrub to large tree distributed in mid-elevation forest in a narrow band from Ambatovy to Zahamena RNI. A member of the “A. micraster complex” by virtue of its sessile flowers subtended by bracteoles, A. mcphersonii can be distinguished from its presumed relatives, A. micraster and A. labatii, by its smaller, more coriaceous leaves that are mostly twice as long as broad, with strongly revolute margins often folded back under the lamina in dried specimens, and by its spreading to reflexed calyx lobes (versus a cupuliform calyx with the lobes ascending to erect in A. micraster).